Tg machine



O. PETERMANN.

TYPE WRITING MACHINE.

APPLICATION FILED MAY 16, 1914.

Patented. Aug. 15, 1916.

L19%AL19;

ts the outer type-bars. I

Application May 16,

To all whom it may concern."

Be it known that I, Orro Pnrnnirann, a citizen of the Republic ofSwitzerland, and. a resident of Groton, county of Tompkins, s and Stateof New York, have invented certain new and useful Improvements in TypeV1 riting Machines, of which the following is full, clear, and exactdescription.

This invention relates more particularly to in the key action offoldable front strike or visible typewriting machines.

- In typewriting machines of the character referred to in which thetype-bars are moved upward and rearward for printing purposes and wherethe type-bars each have a. type head or block having a plurality ofcharacters thereon and particularly where it is desired to make theparts light and compact,

it has been found that under certain conditions the outer type-bars whenactuated will he given a twisting movement which often results in.affecting the alinement while printing. ll'1e typc-bars are arranged ina curved path or basket and the said type-bars are successively arrangedat diii erent angles with respect to the printing point. and at theprinting point in this class of machines, there is usually placed analiner having outwardly projecting prongs or guides between so which thetype heads pass while printing. The key-levers are usually connected bylinks to the type-bars at a point adjacent to and below each pivot ofthe typehar with its hanger or support. Under this arrangement the outertype-hers move at a considerable angle with. respect to the line ofmovement oi the l. and key-levers connected thereto so that as thekey-lever is depressed, a twisting upward movement is imparted to Thiswill make the type-head hit either side or the guide prongs of the guideor aliner resulting in the type being often forced considerably out ofalmornent either by striking the paper too high is or too low. That is,if the type of an entreine left side type'bsr hits the right side .guideprong of the aliner just before reaching the printing point, the typewill be 'ira-ised and print a little higher than it ought so to and inother instances the type will print a little below where it ought toprint.

, In th 'here is a single linl: or connection between. the tyfQe-barandits ccopcratingkey-lever it will he evident that the link end of thekey-levers von; both Specification of Letters Patent.

f ILQRK, ASSIGNOR T0 CORG'NA TYPE-WRITER HG MACHINE.

Patented Aug. 15., lltfllti,

193.4. SerialNo. 839,074.

sides of the machine move at a considerable angle to the path of thecorresponding typebar, this angle gradually decreasing toward the centerof the machine. On the other hand, the link hole or aperture of thetypebar is considerably outside and below the center of the type-bar inits normal position. As the link is at an angle to both key-.

lever and type-bar, the line of force is also at an angle to both ofthem. This action has a tendency also to twist the inner end of thekey-lever and if the said end of the keylever is guided in a comb, itwill tend to twist or press the end of the key-1ever to one side of theslot in the comb due to the unfavorable action of the link and theinitial resistance of the bar when moved. This twisting tendencydecreases the nearer the type-bar is located to the center of the ma-One of the principal-objects of the present invention is to overcome theobjections referred to by providing means interposed between thekey-levers and the type-bars which will compensate for the variation ofthe angular movement of the type-bars with respect to the movement ofthe key-levers so that the twisting action of the type-bars in theirprinting movement will be effectually eliminated.

Another object of the invention is to provide a simple and efiicientsupport for the compensating means and which support may be formed as aseparate element orv as a part or a comb plate or member serving asgolding means for the, inner end of the keylevers.

A further object of the invention is to pro vide simple and ellicientmeans which may be easily made and which may be readily appliedtotypewriting machines as ordinarily constructed.

With these and other objects in view, the invention will be hereinaftermore particularly described with reference to the accompanying drawings,which form a part of this specification, and will then be pointed out inthe claims at the end of the description. 4

In the drawings, Figure 1 is a fragmentary perspective view, showing onemeans for connecting a key-lever and type-bar, the

carriage and other parts of the machine not being shown. Fig. 2 is adetailperspective view of the comb plate 'and support for thecompensating means; and Fig. 3 is a detail plan view of the supportshowing the arrangement of the compensating connections at each side ofthe machine.

The machine frame 10 may be of any sultable form and of any suitablematerial and may have a plate 11 held thereto at the rear portionthereof on which the type bar hangers 12 are mounted. These type-barhangers may be of any suitable construction and ivotally held thereto,as at 13, are typears 14. The type-bars each have a type head or block15 on which may be arranged a. plurality of characters in the usual wayindicating upper case, lowercase and figures or other suitablecharacters,.and which in its printing movement moves upward and rearwardagainst the Work sheet on the platen as is usual in machines of thisclass.

A number of key-levers '16 of any suitable construction are mounted onone or more transversely extending rods 17. Only a couple of key-leversare shown, though a numher are employed, one for each type-bar, and.

said key-levers each have a key 18 for operating purposes and form apart of a universal or standard keyboard. Each key-open ated lever 16has a suitable bearing to properly hold the same on its supporting rod17 and extends inward in substantially a horizontal direction and hasits inner end, as 19,

guided in a vertical slot 20 in a comb plate 21. The parts as thusdescribed may be of the usual or of any preferred construction.

As a means to prevent a twisting action during the angular upwardmovement of the type-bar as each key-lever is depressed,

various means may be employed. As shown,

I provide an angular or bell-crank lever 22 one for each of the outertype-bars and key levers. These levers 22 each are pivoted by a screw 23or otherwise to a support 24. The support 24 may be formed as a partofthe comb plate or member 21 and each support 24 for each lever 23 isangularly arranged with respect to the body of the comb plate 21 andextends crosswise of the key-lever to Which it is connected. Thebell-crank, levers 22 on one side of the machine extend in an oppositedirection to those on the other side of the machine so that their angleof inclination tends to converge at the rear of the ma chine. Each lever22 has two arms 25 and 26 which lie in substantially the same verticalplane and each arm has its end 26" bent at an angle with respect to thearm. The end 26* of each arm is provided with an aperture and connectingthe arm 25 of each lever with a type-bar is a link 27 A link 28 connectsthe arm 26 of each lever with'its cooperating key-lever, the latterbeing provided with a projectin lug or part 29 and an aperture 32therein for the link 28.

It will be evident from the construction shown that the link 28 as thekey-lever 16 is depressed will remain in its normal vertical position toact upon the arm 26 to force the same upward. The arm 25 by reason ofthe angular arrangement of the leverand through the link 27 will movetoward the center and in substantial alinement with the movement of thetype-bar in its upward and rearward printing movement, thus the keyaction divides the power transmitting line of force in two sections eachone following the line of motion of the corresponding part. That is, thelink 28 moves with slight variations up and down insubstantially astraight line, and the link 27 moves with slight variations in thedirection of travel of the type-bar. All side or twisting motionimparted by a single link connection is therefore eliminated and thealinement of the end bars will be just as good and permanent as the morecent-rally located bars. It will be noticed further that the bellcranksor angular levers 22 are staggered so that they swing at an angle to thecomb plate. This is done in order that they may be spaced closer andthat any desired number of end bars on either side of the machine may befitted with this special flexible link connection.

Having thus described my invention, I claim as new and desire to secureby Letters Patent 1. In a typewriting machine, the combination of asupport having pivotal portions, bell-crank levers having forwardlyextending arms pivotally held to said portions to move up and downthereon, type-bars located above the upper forwardly extending arms ofsaid bell-crank levers, links connecting said upper arms to saidtype-bars, keyoperated levers located under the lower forwardlyextending arms of the bell-crank le vers, means for guiding said. leversat their inner ends, and links connecting the key operated levers withthe forward ends of the lower arms of the bell-crank levers, the

arrangement of the links and arms of the bell-crank levers being suchthat each transmitting line of force is divided into two sections one ofwhich follows the direction of travel of the type-bar and the other thedirection of travel of the key-operated lever.

2. In a typewriting machine, the combination of a vertically arrangedsupport having pivotal portions at opposite sides of the machine, saidportions being angularly arllO ranged with respect to the body of thesupport and those on one side of the machine angularly arranged withrespect to those on the other side, bell-crank levers having forwardlyextending arms pivotally held .to said portions to move up and downthereon, type bars located above the upper forwardly extending arms ofsaid bell-crank levers, upwardly and rearwardly extendinglinksconnecting said upper arms to said type-bars, key-operated leverslocated under the lower forwardly extending arms of the bell-cranklevers, and vertically disposed links connecting the key-operated leverswith the forward ends of the lower arms of the bellcrank levers.

3. In a typewriting machine, the combination of a support having pivotalpor-' tending arms of said bell-crank levers, up-

wardly'and rearwardly extending links connecting said upper arms to saidtype-bars, I

key-operated levers located under the lower forwardly extending arms ofthe bell-crank levers, said support being slotted to guide said leversat their inner ends, and vertically arranged links connecting thekeyoperated levers with the forward ends of the lower arms of thebell-crank levers, the

arrangement of the links and arms of the bell-cranks being such that thetransmitting line of force for eachtype action is divided into twosections one of which follows the direction of travel of the type-barand the nation of a support having its body provided with slots forminga comb plate and.

tially parallel relation to each other and pro1ecting inwardly at anangle intersecting the center of the machine, type-bars connected to thebell-crank levers, and key-operated levers having their ends guided inthe slots of the comb plate and connected to said bell-crank levers.

5. In a typewriting machine, the combination of a support having itsbody provided with slots and with angularly disposed integral pivotalportions, a plurality of bell-crank levers located on opposite sides ofthe machine and angularly arranged with respect to the support and thelevers on one side of the machine angularly arranged with respect tothose on the other and pivoted to said angular portions of said support,typebars pivoted to swing upward and rearward at an angle, key-operatedlevers having ends guided in the slots of the support, and linksconnecting the angularly arranged bellcrank levers to the type-bars andother links connecting the key-operated levers to said bell-cranklevers.

6. In a typewriting machine, the combi nation of a type-bar, akey-operated lever,

a comb plate forming a guide for said key- I links connecting the leverto the type-barand to the key-operated lever.

This specification signed and witnessed this 28th day of April, A. D.1914;.

' OTTO PETERMANN.

Witnesses:

, Ross I. ALLEN,

H. M, Ivns.

